Layout and drill jig



April 17, 1945. w.y scHoENlGER 2,373,918

LAYOUT AND DRILL JIG F'i'led Nov. 17, 1941 4 Sheets-Sheet 1 N ke Alton/v April 17, 1945 w` scHol-:NIGER 2,373,918' I LAYOUT AND DRILL JG Filed Nov. l', 19414 4 Sheets-Sheet 2 A ltormf)y l In venfor zoevzgen f April 17, 1945 -w. SCHOEN|GER LAYOUT AND DRILL JIG 4 Sheets-Sheet 3 Filed Nov. V174, 1941 111 venlor April 17, 1945. W'SCHOEMGER 2,373,918

LAYOUT AND DRILL JIG Filed NOV. 17, 1941 4 Sheets-Sheet 4 il S In@ l l Inventor Patented Apr. 17, `194,5 'y

."ApplicationfNovember 17 Ns'roiaims. (olivia-62.)1y

'The present invention relates tonew anduseful improvements inlayout and drilling devices for accurately spacing iholes in -machine Vparts and has ffor its primary-` object: to i provide ai device of this character adapted for use in laying outand drilling circular @work as'w'ell-asirectangular or -otl-ier-polygonal workffl f A: further object vis to -provide a layout'and drill jig of simple and practical construction, which isfeicient .and reliable-in performance; relatively inexpensive yto vmanufacture and :otherwise .-well adapted for-the purposesfor which the same is intended.

:Otherobjects and advantages reside inithe details ofconstruction and-operation as'more fully hereinafter 'described and"- claimed,V reference being-had to the accompanying. drawings forming part hereof wherein like numerals refer torlilrev parts throughout, .and 1in which:

Figure 1 is a top plan viewgrshowing the outside micrometer attachments. v Figure 2 lis abottoml plan view,vshowingmthe inside micrometer attachments.

, rsrlfseriarno. 41195492 ating the jig.

4:Figure '3 `is-a transverselsectional View taken substantially on a line 3`3 of Figurel.

.Figure 4 isa similar view-taken `substantially onalineA-dsofiFigure v t f l Figure V5 =is a-perspective `view of'the bracket for the outside :micrometer adjustment.

y"Figure 6 is la similar view of th'eplateior the inside `micrometer adjustment. l 1 fFigure '7 isa fragmentary longitudinal sectional view throughthey bushing" and outer end` of the slidable drilling bar.

'filgure`y 8 is i a :perspective 4View off. the drilling @bushing orguide. 'f lf @Figure 9 isa sidefelevational View :showing thev drilling'bar in ,conjunction` with Aa rectangular piece. ofwork.

Figure `10-isa'` top planzview` thereof. Figure "1l `is 'an end elevational Viewk of the fr-'head forthe drilling :bar showninFigures/Q and'llo and :withvthe barshownin section,and fFigure 12 isa fragmentary .longitudinal vsectional :view taken substantially on' a line y|2-l2 ofiFigur-elO. l A

Referring -no-w to 'the drawings vin detailand withreference particularly to the form Aof'the invent-ion illustrate'd'in Figuresylto', inclusive, the-'numeralfE designates afdisk member having a centrally disposed undercut opening 6 yformed y therein and in whichv is rotatably positioned a hublS having its 'edges 'conformably fittedin the opening. The hub isformed with a central opening 6' and the disk is formed with a plurality ofl [The bottomsof the .disk15 is formedwithz-ash'allow.` `circular recess 8 Vwithin, which is nttedwa .disklike b-ase plate 9 and secured theretolby .means of screws l0,.'theibase plateholdingthe :hub :5' in Vpositionagainst@theunderside of the di'skh.

-Theip/eripheral e'dg'esof the base .plate 9a-'are yformedvvvith a plurality o'flextensions lil having `soclizetsLZ formed inithe edgefthereof, the extensions Ifl tbeingrspaced ninetydegrees `from each other Yon the .edgefportion ofl the base platelS as shown to advantage in Figure 2 of the drawings. @Risingffrom the upper surfacelof thejdiskr are apair ofguide blocks 1|.3having onejedge disposed in"'spa'ced parallel relationvwithieachother and between 'which is-sl-idably positioned a drill. guide 4bar designatedat M, the bar being=of rectangular shapeincross-section. The bar is secured inpovsition 'between the vlguide `blocks f-l3nby meansvof 'al cap plate Ir5 secured to the guide blocks :by set screws-.116. ThefcapplateV |.f5 .is rformed with a central openingfllin alignment 'with the central Aopening L6 of I8 adapted for selectively-registering with the openings ..6 andi'l'lA for receiving a retaining pin fI-Qzhaving alknurledhead l2t),v r Y f l. u'Ihe'bar I4, adjacent its uouter .end,.is:formed with an opening 2| within which is removably iitteda' guideI bushing l22`having a bore 23' extending therethrough for receiving `a drill, the bushingA 'being secured against movement lin atherbar )oy-means of a retaining pin 24.

'Pivoted vto the outerwendio'i the bar |`4is :a hinged block adapted for swinging under 'the 'bar =I-4 to Atake up any space between' the bar and .the workA designatedfat '2 -when a clamp (not f shown) v is usedr in drilling-,thework-in the present instance beingl represented as a ringrnember. y

When the inner periphery of the work 26 -is nished for layout purposes, an internal micrometer adjustment is provided and comprises a pin rows .oifopenings 'Lthe the k.disk L5 andfthe .bar 'I 4 'isi formed ywith'aiplurality of longitudinally spaced openings 28 for each extension I I and having one end positioned in the socket I2. A plate member 2'I having a slot 21 formed therein is positioned on each pin 28 and secured thereto by means of a set to read the micrometer.

Where the outer periphery of the work 26 is finished for layout purposes, a plurality of micrometer adjusting supports of a form designated at 32 are provided, each support 32 likewise having a longitudinal slot therein designated at 33 and is formed at its inner end with a stud 34 adapted for insertion in the outer end of the pin 28 and is secured thereto by a set screw 35. The outer end of the support 32 is formed with a down-turned flange 36 having an opening 31 therein and in which is freely positioned the pin 38 carried'by the micrometer 39 of' conventional construction for engaging the outer periphery of the work.

One edge of the upper surface of the bar I4 is formed with graduations 40 in inches and the openings I8 of the bar are adapted to align with one of the openings 'I of the disk 5 in accordance with a predetermined number and positioning of openings to be formed in the work and the aligned openings I8 and 'I are then retained in position by means of a retaining pin 4I. The guidebushings 22 may be provided in sets having bores of differentl diameters to accommodate bits of various sizes in accordance with the size of hole to be drilled.

In the form of the invention illustrated in Figures 9 to 12, inclusive, the layout and drill jig is shown in use upon a, work of rectangular shape as shown at 42, the drilling bar being indicated at 43 and is provided with the longitudinally spaced openings 44 therein, as Vyheretofore eX- plained, as well as being provided with the guide bushing 45.

The bar is slidable in a slot 46 in a crosshead 41 having a pair of openings 48 therein adapted for aligning with the openings 44 and'provided with retaining pins 49 for securing the crosshead in adjusted position relative to the bar. The underside of the clamping head 48 is formed with a stop 50 adapted for abutting the adjacent edge of the work, as shown to advantage in Figure 12 of the drawings and wings I overlie the upper surface for the work and adapted for engagement by a conventional form of clamping device (not shown) for receiving the crosshead against movement on the work.

It is believed the details of construction, operation and advantages of the device will be readily understood from the foregoing Without further detailed explanation.

Having thus claim is:

1. A layout and drill jig comprising a disk having a central opening and a plurality of rows of concentrically arranged openings, a drilling guide bar, means engaging the openingsgfor securing the bar to the disk in radially extending relation thereto, a drill guide carried at the outer end of the bar, and means projecting radially from the described the invention what I 2. A layout and drill jig comprising a, drilling guide bar having a plurality of longitudinally spaced openings, a rotatable member slidably receiving one end of the bar, a stationary member having concentric rows of openings adapted to register with the openings of the bar, a retaining pin inserted in aligned openings in the bar and said stationary member for securing the firstnamed member against rotation, means for centering the members with respect to circular work to be drilled, and a drill guide at the other end of the bar. 3. A layout and drill jig comprising a drilling guide bar having a plurality of longitudinally spaced openings, a base, a disk secured on the base, a hub rotatable in the disk, means slidably securing the bar to the hub in radially disposed relation, said disk having a plurality of concentric rows of openings adapted to register with the openings of the bar, a retaining pin inserted in aligned openings inthe bar and disk for securing the hub against rotation, means for centering the disk and hub with respect to circular work to be drilled, and a drill guide at one end of the bar.

4. A layout and drill jig comprising a drilling guide bar having a plurality of longitudinally spaced openings, a base, a disk secured on the base, a hub rotatable in the disk, means slidably securing the bar to the hub in radially disposed relation, said disk having a plurality of concentric rows of openings adapted to register with the openings of the bar, a retaining pin inserted in aligned openings in the bar and disk for securing the hub against rotation, micrometer supporting pins projecting radially from the base and adapted to support micrometers thereon in a position for centering the disk and hub relative to circular work to be drilled, and a drill guide at one end of thebar.

45. A layout and drill jig comprising a drilling guide bar having a plurality of longitudinally spaced openings, a base, a disk secured on the base, a hub rotatable in the disk, a guide on the hub slidably receiving the bar, means adjustably securing the bar in the guide in a radially disposed position, said disk having a, plurality of -concentric rows of openings adapted to register with the openings of the bar, a retaining pin inserted in aligned openings in the bar and disk for securing the hub against rotation, means for centering the .disk and hub with respect to circular work to be drilled, and a drill guide at one end of the bar.

6. A layout and drill jig comprising a drilling guide bar having a plurality of longitudinally spaced openings a base, a disk secured on the base, a hub rotatable in the disk, a guide on the hub slidably receiving the bar, means adjustably securing the bar in the guide in a radially disposed position, said disk having a plurality of concentric rows of openings adapted to register with the openings of the bar, a retaining pin inserted in aligned openings in the bar and disk for securing the hub against rotation, radially disposed pins carried by. the base, micrometer supporting members removably carried by the pins and adapted for supporting micrometers in a position for centering the disk and hub relative to circular work to be drilled, and a drill guide at one end of the bar.

WILLIAM SCHOENIGER. 

